Sander



22, 1959 H. s. BROWN 2,904,940

SANDER Filed June 25, 1958 2 Sheets-Sheet l INVENTOR, HO WARD S. BROWN Sept. 22, 1959 Filed June 25, 1958 H. 5. BROWN SANDER 2 Sheets-Sheet 2 INVENTOR. HOWARD 3. BROWN BY I f United States Patent SANDER Howard S. Brown, Vero Beach, Fla. Application June 25, 1958, Serial No. 744,389 '9 Claims. (Cl. 51-213) tool having provision for depositing water as the abrading action proceeds. The present invention is directed to :a tool which satisfies this need.

Accordingly, it is an object of this invention to provide -a novel and improved abrading tool.

it is also an object of this invention to provide a novel abrading tool having its own water supply and so constructed that the water tends to remain in the tool when the tool. is at rest and is discharged from the tool in response to the latters movement during use.

Other and further objects and advantages of this invention will be apparent from the following description of two presently preferred embodiments thereof, which are illustrated in the accompanying drawings.

In the drawings:

Figure 1 is an exploded perspective view, with parts broken away for clarity, showing the preferred embod-iment of the present tool;

Figure 2 is a longitudinal section through the Fig. 1 tool in its assembled condition;

Figure 3 is .a perspective view of the outer body memher in an alternative embodiment of the present tool;

Figure 4 shows the present tool connected through a hose to'a water container for keeping the water supply in the tool replenished; and V Figure 5 shows a hose connection to a waterfaucet, which may be connectedto the present tool to maintain its water supply.

Referring to Fig. l, the present tool comprises an outer body member 10, an inner body member 11 and an abrasive web 12.

The outer body member 10 is constructed of plastic or other suitable material and is of tapered configuration. The oppositely disposed, flat major walls 13 and 14 incline toward each other and intersect at the narrow end 15 of the tool. These major walls are interconnected by opposite side walls 16 which are triangular in outline.

The outer body member is open at its wider end and presents an elongated cavity 17 which extends lengthwise along the body member to the latters narrow end, as best seen in Fig. 2. This cavity is generally triangular, as shown in Fig. 2. At the outer end of the cavity 17 the major walls 13, 14 of the outer body member present internal, flat, parallel surfaces 18 and 19 which face each other, extending inward from the open end of the outer body member.

The inner body member 11 for the major portion of its extent is shaped substantially complementary to the cavity 17 in the outer body member. It comprises flat major walls 20 and 21 which incline toward each other at one end, and triangular side walls 22 which intercom heat the major walls. The inner body member is hollow and defines -a chamber 23 (Fig. 2) which receives water.

Toward its wider end, the inner body member presents flat parallel walls 20a and 21a, which are extensions of the inclined major walls 20 and 21. When the inner body member 11 is inserted fully into the cavity 17 in the .outer body member 10, as shown in Fig. 2, the walls 20a and 21a on the inner body member are positioned in close, confronting relationship to the parallel internal surfaces 18 and 19 on the outer body member to pinch the respective ends of the abrasive web 12 between them.

The wider end of the inner body member 11 has a transverse end wall 24 provided with an open cylindrical neck 25, which leads into the chamber 23 and which is closed by a manually removable end cap 26.

At its narrow end theinner body member 11 has a discharge opening 27 for passing water from the chamber 23 into the cavity 17 in the outer body member 10. Although one opening 27 is preferred, more than one such opening may be provided if desired.

The narrow end of the outer body member 10 is formed with a pair of discharge passages 28 and 29 for passing .water from the cavity 17 to the periphery of the outer body member.

The discharge passages are offset laterally on opposite sides of the discharge opening 27 formed in the inner body member when the parts are assembled as shown .in Fig. 2;

The web 12 preferably is of porous fabric or wire mesh impregnated with suitable abrasive material. The 01) posite ends 30 and 31 of the abrasive web are turned over around theends of the major walls 13 and 14 of the outerbody member at the latters open end and are engagedwtightly between the confronting parallel surfaces 18, 20a and 19, 21a on the outer and inner body members 10 and 11, as shown in Fig. 2. Between its ends the abrasive web 12 extends snugly across the major faces 13, 14 of the outer body member 10 and around the latters narrow end 15.

If desired, a resilient backing may be provided between the abrasive web 12 and the major walls of the outer body member.

In the use of "this tool, the abrasive web 12 is clamped ,in place as shown in Fig. .2 and the chamber 23 inthe inner body member 11 is filled with water through the neck 25. The end cap 26 is then replaced to seal the chamber at [this neck. The thickness of the abrasive web IZ-engaged between the inner and outer body members W provides a slight spacing between them.

When the tool is at rest, the water tends to remain in the tool because the chamber 23 is not vented directly to the atmosphere.

However, when the tool is moved back and forth this causes the water to flow out through the discharge opening 27 in the inner body member and out through the discharge passages 28 and 29 in the outer body member, and thence through the interstices in the abrasive web at the underside of the tool. While the tool is being moved to perform the abrading operation, the water continues to flow out through the Web, so as to tend to keep the web from clogging.

From the foregoing, it will be apparent that the present tool is of extremely simple construction which lends itself to economical manufacture, and foolproof assembly and operation, as well.

Obviously, the tool may be used as a dry sander simply by emptying the chamber 23.

Thus, I have provided a tool which may readily be converted from dry to wet sanding operation, or vice versa.

In place of the discharge passages in its narrow end, the outer body member may be provided with a plurality of discharge passages in its bottom major wall, at least. Fig. 3 shows such an alternative construction of the outer body member, inverted, the discharge passages being designated by the numeral 32. This alternative outer body member in other respects would cooperate with the inner body member and the abrasive web in the same manner as already described in detail.

' It should be particularly noted from Fig. 2 that the proximity of the walls Ztl and 21 of the liquid container from the inner walls of the outer shell 11 is such that i a capillary effect is realized whereby the liquid more effectively flows from the opening 27 to the openings 32. As shown in Fig. 4, if desired, the present tool may be connected through a hose 41 to a water container 40. The hose is connected to thet tool simply by removing the end cap 26 and telescoping the end of the hose over the open neck on the tool. This arrangement enables the tool to be used over a longer period of time without stopping to refill its container 23.

In like manner, the tool may be connected to a Water faucet 42 through a hose 43 (Fig. 5) to provide a continuous supply of water to the tool.

While there have been disclosed herein and illustrated in the accompanying drawings two presently preferred embodiments of this invention, it is to be understood that various modifications, omissions and refinements which depart from the disclosed embodiment may be adopted without departing from the spirit and scope of the present invention.

I claim:

1. An abrading tool comprising a hollow outer body member open at one end and having a cavity extending inward from said open end, a hollow inner body memand an abrasive member at the periphery of said outer body member.

3. An abrading tool comprising a tapered hollow body member having oppositely disposed major walls which incline toward each other in a direction along the body member toward one end thereof, said outer body being open at its opposite end and having a cavity extending from said open end of the body fnember lengthwise along the body member between said major walls, said cavity tapering toward said one end of the outer body member, a tapered ,h'ollowinner body member-received in said cavity in the outer body member, said inner body member havinga water chamber therein and at its inner end having a discharge opening leading from said chamber into the cavity, said outer body member having discharge passages leading from said cavity to the periphery of the outer body member, and a porous abrasive web extending across said major walls of the outer body member and having its opposite ends clamped between said outer and inner body members at said open end of the outer body member.

'4. The tool of claim 3, wherein said inner body at its outerend carries an open neck which leads intosaid chamber, and a removable end cap for closing said neck. 5. The abrading tool of claim 3, wherein said outer body member presents opposite, flat, parallel, internal surfaces on said major walls which extend inward along said cavity from said open end of the outer body memher, said inner body member has oppositely disposed ber extending into said cavity, said inner body member I member having a cavity therein, a hollow inner body member received in said cavity and having a liquid chamber therein, said inner body member having a discharge opening leading from said liquid chamber into said cavity in the outer body member, said outer body member having discharge passage means leading from said cavity to the periphery of the outer body member,

flat, parallel surfaces on its periphery which are positioned in confronting relation to said parallel internal surfaces on the outer body member, and the respective ends of the abrasive web are pinched between said par allel surfaces on the outer and inner body members.

6. The abrading tool of claim 3, wherein said discharge passages in the outer body member are located at said one end of the outer body member.

7. The abrading tool of claim 3, wherein said discharge passages in the outer body member are located in one of said major walls of the outer body member.

8. An abrading tool comprising a hollow body which has a liquid chamber therein and passage means leading from said liquid chamber to the periphery of the body, and a porous abrasive web on the periphery of said body and extending across said passage means thereat.

9. The tool of claim 8, wherein said body at one end carries an open neck which leads into said liquid chamber, and removable means for closing said neck.

References Cited in the file of this patent UNITED STATES PATENTS 528,772 Dutton Nov. 6, 1894 FOREIGN PATENTS 5,704 Great Britain Mar. 13, 1896 

